Guess what I got in the mail? I finally got it after ordering it 3 weeks ago. I saw the product in the news and decided to check it out. I hooked up my caffeine junky trainer and he felt nothing. Later on that day I tried it myself and I definitely felt it. There was this intense bitter lemon lime aftertaste and then the caffeine rush hit me. It felt like I downed 2 cappuccinos.
I personally like drinking coffee and I would say this is definitely not a substitute. It is cheaper than my coffee habit and probably healthier than guzzling 2+ lattes a day, but I prefer the gradual caffeine dose from coffee rather than the immediate rush from the Aero shot.